In principle it’s the same thing, but in practice it’s proof of how much of what went into Tron they invented. There was really no CGI yet, they were approaching it as animation they wanted to put onto live action film, not unlike Mary Poppins, and the black sets were intended to make it easier. Everyday concepts like green screens used in even non-FX movies and TV shows now, motion capture dots, weren’t there. They made this up as they went along.
I think the biggest obstacle a new Tron will have is the lack of wonder. When Tron came out it was a “look inside” a world almost none of us understood, very few knew anything about computers, what they did how to use them. And while we knew it didn’t work like in Tron world there was a certain metaphor there that matched how we discussed them. Now computers are an everyday thing, there’s not a lot of wonder there. So yeah, they’re going to need a really good story.